Estimation analysis

I need help identifying variables and conducting t-tests and chi-squared tests and how to use Excel to calculate the data.

Identify three continuous and three discrete variables and describe their distribution numerically (e.g., central tendency, spread) as well as graphically. Compare the results.
Using the variables selected, conduct all possible t-tests and chi-squared tests. Describe your findings.
In addition, discuss how data limitations (e.g., missing values, etc.) can affect the validity and reliability of statistical estimations and tests of differences.